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My Thunderbird mysteriously lost the last 2 months of emails. I felt relieved because I had backed up on Time Machine just yesterday but... I can't find the files ANYWHERE to restore them! PLEASE HELP. I have lost a bundle of important emails

I also tried to repair the folder from Thunderbird, but it does not help. Clearly I chose the wrong program to use for email

Its there on my normal HD, but for some reason I can't find the Thunderbird folder in the Library on the backup. And I have NO exclusions set on Time Machine... can't find it through a spotlight search either....

Thank you for jumping in chsag. My problem appears to be that Time Machine did NOT back up the hidden Library folder... grrrrrrr! I know I can find it by pressing OPTION when I click GO, but is there a way to permanently unhide it? Do you have any idea how Time Machine deals with it?

Okay I found the terminal command to unhide it [ chflags nohidden ~/Library/ ] , but is there a chance is it hidden in my time machine backup? and a way to reveal it? or does time machine not back up hidden files?

really really really appreciate your help. its CRAZY frustrating doing responsible back ups, and then not finding the files i am looking for. if you can help with figuring out if it backed up the hidden library folder, and how to reveal that, i would be forever grateful

No, Time Machine should backup everything that's not specifically excluded and that includes hidden files, folders, etc. I don't have my TM drive attached right now so I can't verify if the hidden folder can be unhidden but I suspect it can.

Well, I guess I was wrong! I just attached my Time Machine drive and looked for the Thunderbird Mail file. Guess what? Time Machine does not backup the "cache" folder. And that's where Thunderbird stores the Mail and News items and folders.

I can view both my Thunderbird News and Mail folder from Finder, but it's nowhere to be found in any of my Time Machine backups. Why in the world Thunderbird buries the mail and news folders in the Cache Metadata folder is beyond me.

I guess we have to figure out how to backup that folder. I have a backup of it anyway since I also use Carbon Copy Cloner in conjunction with Time Machine to do my backups.

According to this page, Thunderbird stores messages in the user profile (which makes sense). I could be wrong since I don't have TBird to check this but it might be worth looking in the TBird profile folder.

I couldn't figure out a way to reveal the Hidden Library director on my external drive, but I did notice Time Machine does duplicate backups to a partitiion called Mobile Backups (yay). I finally FOUND the file but... when I try restore or manually copy the backup, I get

The Finder can’t complete the operation because some data in “” can’t be read or written.
(Error code -36)

So it appears the trick is to unhide ALL hidden folders (not just the library), and then I too can find the files in the Time Machine. Thank you so much for all your help. I've restored everything, and the inbox now turns up empty. *sigh* Wow I hate this program. I backed up before restoring, and noticed a 2 gig file called inbox alongside the inbox.msf . This is the file that I have been trying to manually copy across, and keep getting the

The Finder can’t complete the operation because some data in “” can’t be read or written.
(Error code -36)

error with. I am wondering if this is why Time Machine didn't back this file up. When I manually throw this file back in, my inbox returns (but still with the last 3 months missing)

So I am back to where I started. Any idea why I can't move this file? I did run a disk repair, and everything was fine...